Store Testsuite-Triggers: list in sources

Compute an inverse trigger → sources map, as that's usually the direction that
britney is interested in.

britney.py

@@ -236,16 +236,17 @@ check_fields = sorted(check_field_name)
 class SourcePackage(object):
 
     __slots__ = ['version', 'section', 'binaries', 'maintainer', 'is_fakesrc',
-                'testsuite']
+                'testsuite', 'testsuite_triggers']
 
     def __init__(self, version, section, binaries, maintainer, is_fakesrc,
-                 testsuite):
+                 testsuite, testsuite_triggers):
         self.version = version
         self.section = section
         self.binaries = binaries
         self.maintainer = maintainer
         self.is_fakesrc = is_fakesrc
         self.testsuite = testsuite
+        self.testsuite_triggers = testsuite_triggers
 
     def __getitem__(self, item):
         return getattr(self, self.__slots__[item])
@@ -336,6 +337,14 @@ class Britney(object):
         self.binaries['tpu'] = {}
         self.binaries['pu'] = {}
 
+        # compute inverse Testsuite-Triggers: map, unifying all series
+        self.log('Building inverse testsuite_triggers map')
+        self.testsuite_triggers = {}
+        for suitemap in self.sources.values():
+            for src, data in suitemap.items():
+                for trigger in data.testsuite_triggers:
+                    self.testsuite_triggers.setdefault(trigger, set()).add(src)
+
         self.binaries['unstable'] = self.read_binaries(self.options.unstable, "unstable", self.options.architectures)
         for suite in ('tpu', 'pu'):
             if hasattr(self.options, suite):
@@ -587,6 +596,7 @@ class Britney(object):
                         None,
                         True,
                         [],
+                        [],
                         )
 
             self.sources['testing'][pkg_name] = src_data
@@ -662,6 +672,7 @@ class Britney(object):
                         None,
                         True,
                         [],
+                        [],
                         )
             self.sources['testing'][pkg_name] = src_data
             self.sources['unstable'][pkg_name] = src_data
@@ -844,6 +855,7 @@ class Britney(object):
                             maint,
                             False,
                             get_field('Testsuite', '').split(),
+                            get_field('Testsuite-Triggers', '').replace(',', '').split(),
                             )
         return sources
 
@@ -993,7 +1005,7 @@ class Britney(object):
                     srcdist[source].binaries.append(pkg_id)
             # if the source package doesn't exist, create a fake one
             else:
-                srcdist[source] = SourcePackage(source_version, 'faux', [pkg_id], None, True, [])
+                srcdist[source] = SourcePackage(source_version, 'faux', [pkg_id], None, True, [], [])
 
             # add the resulting dictionary to the package list
             packages[pkg] = dpkg